Rust-resistant, 6" blades are made from durable steel that's coated with carbon to deliver lasting sharpness. Reversible blades are individually wrapped in wax paper to prevent them from rusting. Handy dispenser protects extra blades for proper storage and safe transportation. Replacement blades are designed for use with Unger TX100, TM100, EG100/150, EN100/150 scrapers (each sold separately).